Cannot figure out how to upload the picture of a user through activiti rest. I think in documentation there is an error because it says that you can do that with GET request. Is the real method of uploading picture of a user is similar to uploading an atachment of process or is it different? I tried to watch the requests logs (via chrome developer tools) when uploading user picture through activiti-explorer, but i couldn't figure out how the picture is uploaded because it was not send through requests. I think activiti-explorer uses some other technique then just simply use activiti-rest request.